Taxonomy: Kingdom - Plantae (plants). Subkingdom - Tracheobionta (vascular plants). Superdivision - Spermatophyta (seed plants). Division - Magnoliophyta (flowering plants). Class - Magnoliopsida. Subclass - Asteridae. Order - Scrophulariales. Family - Orobanchaceae (Broom-rape family). Genus - Orobanche L. Species - Orobanche uniflora L.
Ecology: One flowered cancer root (also called one-flowered broomrape) is a native annual found from Vancouver Island and Southern British Columbia south to California, east to Florida and Newfoundland. This species is often found in damp woods and thickets, and open places from lowlands to moderate elevations in mountains.